Innitiative or sucker punch?
First .... the question is ambiguous.
It is open to interpretation of the reader, whether it be action that can not be avoided, or one who is simply taunting a precarious situation to get worse.
Feint, and cause a response? Or use the power of your very presence, bearing, and voice to avoid a confrontation.
If I take the question at the exact meaning of the words, we are causing the action to happen simply because we are wanting it to be a confrontation. But, if we look into the heart of Aikido, then we capable of determining the difference between confrontation, diffusing confrontation, or walking away?
I think the clarification of "having to decide the least harmful action for the situation that cannot be avoided" should precede the question to clarify this point.
For those of you still trying to evoke a response, or proving how effective your skills are by easily accepting combat, you need to leave Aikido for a while an re-examine what you are trying to learn.
I had to review the basic thesis for O'Sensei changing the focus of Aikido after WWII. There is an interview with him and his son where he mentions how he taught soldiers how to kill in WWI, and by WWII he wanted to give us an art that did not kill. It can be found in Aikido Online if you want to read it.
Anyway, how many sensei's have instructed a lesson and told you how to kill or injure with Aikido? None ... as least not in my experience. WHY?
Many of them have studied, Karate, Judo, Jujitsu, and some have studied other arts, but they all find the least harmful way to deal with a situation, don't they?
Those of us who have had to deal with violence and been on either the recieving end or dealing end, find it distasteful perpetuate violence. Hence, we reach into the heart of Aikido, turning violence into least harmful solution.
Isn't that what we were looking for anyway?